DE Luke vs. ROTS Sidious
Combatants: Dark Empire Luke, who at this point was a Jedi master vs. ROTS Sidious.
Setting: Mos Eisley Spaceport, "you will never find a more wretched hive of scum and villainy". Note that these gladiators are battling in the populated streets, so there's tons of environment to manipulate, from merchant stands to speeders to the very ground (sand) they walk on!
Rules: All-out. I don't care if Sidious KO's Luke by chucking a few Jawas at him. I'll allow it!